CDL (Commercial Driver)
CDL General Knowledge Practice Test 18
Free — no payment neededLevel: Mixed
20 original CDL General Knowledge questions based on the federal motor carrier safety rules (49 CFR). Practice test, not affiliated with any government agency.
Created by AI
Practice test, not affiliated with any government agency. Original questions written from public sources, checked by a second AI reviewer and automated checks. Rules change; confirm with the official handbook. Available in 2 languages (translations are machine-made and checked automatically).
Before you start
- Questions
- 20 multiple-choice questions, one at a time
- Time
- About 12 minutes. Untimed — take as long as you need.
- Pass mark
- 16 out of 20 correct (80%)
- Feedback
- Your score, the correct answers and short explanations when you finish
- Account
- Not needed. Your answers stay in this browser.
What this test covers
Hours of serviceVehicle inspectionAlcohol drugs and fitnessDriver qualification and disqualificationSeeing and communicatingRailroad crossings
Preview the first question
How often can a driver use the property-carrying 16-hour exemption, unless a new period began with a long break?
- Only once a month
- Not within the previous 6 consecutive days
- Not within the previous 2 consecutive days
- Only once a year
Answers are revealed on the results page after you finish.